Sculpt tools not working
I think it's a glitch in the new 2.9 edition.  It's frustrating the hell out of me too.  It was working fine last night.  I read someone suggesting to simply revert backwards to 2.8.  But come on, Blender!  You're 3D modeling software.  Surely you should be able to pull off the FIRST THING ABOUT SCULPTING!  It's not like you haven't had to time to figure it out by version 2.9!  I'm so sick of the broken ass program.  You sure do get what you pay for.  Free as dirt!